Automatic shut-off for pneumatic tubes.



PATENTED' MAY 5, 1908.

B. FLINT.

OMATIO SHUT-OFP FOR PNEUMATIC TUBES.

AUT

APPLICATION FI LED APELZS, 1907.

on an arc having an opening at ihc (lHi llrr-ra disposed portion iinnwiin *r rm "TX m m in o N $.iiiihii ii iiiinii EDGAR FLINT, 3F TORONTO i )N'lARIO, CANADA.

FLUTGEEATKC SE'UT OFF FGE PNEUMATKC Til'BES.

Eipecification of Letters Patent.

' Patented May 5, 1908.

Application filed April 28. 1967. Serial No. 86933 3.

To all idiom if may concern:

5 forming part of my invention, Fig.

Boil Known ihnt l. EDGAR r 1.1m, of the which the following is 1hr. specification.

automatic slintolie; for pnennnific when. and the obgecb of tho invcnilon is in ilcvisc n.

I irnnsinission or'n cash carrier box.

3, is an enlarged perspective detail.

in the dim-rings like. letters of reference iniiicnte corresponding ports in each figure. A is: rho end of a. pneumatic tube for the In my 3 invention the end is preferably arc-shaped at My invention relates in improicmenis in means, whereby when the door is opened by ,i

the cashier or salesman in insert Oil-Cl. carrier it Will. ni'iioinnilcnlly close without any further nl'lcntion oi the cnshier, nml yet;

when open will cli'ect :in npcning of rhe inbe in the nlmosnhcrc in proximity in ihc aiour (luring ihc pcrnni ihni lhc box traveling.

which opcningn'ill be grininnlly nnionmiicnliy closed ii'i'rhout on niicnion of ihe cashier or salesman nnd ihcrol'iy cil'cci n m xing of time of thc cashier or wlcsnn'in iorniorly.

ncccssnw io opcn the (lo-or icinsert the box and to c osc the door ni'lcr llll box lifiS been received in the snlcsmnn'scnii or vice yersa.

At ihc present time it is i:-i0mfli lo nliow the door lo remain open, which necessiinlcs lhc. rim-wing oi the nir b \git'illlll'l ihrongh the tubes continnon.- l \'v continuous power. which if in in object in awe-iii :nnl nniy use i-hc power during the pcriuxl that thc box is traveling from the cnxlgicr iliO sniemnnn or rice "-xcrsn.

and is provided with a collar A and. an opening at the end of the at m ied end, which is; normally closcriby a. d or which suspended on lhc straddle arms 0 pivotally cnnnecicrl to lhe collnzm-X".

l) is o crooked arm ilcsigned to be nscrlfor pivoted at l) inicrincilinlc .of its length and My inveniion ((mSisis cssnm inlli' of a lube having the door and consii'nciml prcl'crnbl x' of, door suitably hinged :zml designed in close the openingrhn brnnch iubc extending from the arc-shaped poriion oi ihc tube in the form of on ciboi'v inning n icrticnlly lll" pending port-ion prix-viilml with an: opcniin: n: the bottom nmi :i nnlmnniic mcnnn located in tho vcriicnlly (iinponcrl purl ion ill -iile elbow for opening thc hnii-oin of such v-erficnliy iil lhc door is opened mni. for closing: ii cmnnc grni'lnni y immediately the door clc. l nsnl (lllllllf: the period ihnl the box is raw-ling, the parts being;' arranged. and connl rncacil in (i0- tnil as hereinafter moi-c pnrlicninrly explniniriv Figure l, is n pcrspcciivc Vii-n showing oncend of ii pncnmniic lnbc in which the ooor for the inscrl-ion oi' the box is locn'tcib' showing the pnrls involved in in invention. Fig. 2, is on cnlnrgcll i'criicnl scciion through the vertically (llfiPUHiT-Li portion of the eihov;

runner-toil by a link D to the arm C. BY

5 o iriori:

throwing lhc arm I) into the position shown in dotted lines the door B 11 121) be readily openeii.

i is nn elbow extending from lho arc.- shnpcii ezni A at n point in proximity to the iloor i3 and behind it, and E is the vertically disposed portion of the elbow.

"ihc vertically disposed portion E"'of the clhmi' "F isprovirlcrl at the bottom with an -lcrnni coilnr E having a reduction sleeve l? locnicil within thesnine; Within the rerlnelion sleeve is secured one end of the lyivscopic tribe E E3, which is (lctnchnbly conneclcii iothe inbo E and collar E by a sercw pin i filling into a bayonet F ina lein ihc lower end of the collar E.

l a collar sccurcil at illl lower cml of the purl ion i l offrhc iclescupie tube and provided \i'ilh a spirlcr G having a central hole G through; which extends the bar 11 having g1 scrics of hole ii and an adjustable clip H is scculcrl on the bar by a pin il running through one of these holes as will be seen the bar ii is of nnguhir cross section, and holc G" in of similar shopc, so thnt saiii bar is prerenicil from rotating The upper curl of the inn" ii is provided with a jun" ll in which'in ii" is 21 iii-sic through which the bar II cx-. icnils and ll is a pin cxtelnling above'lliis (link to arc'i'cnt. it.- moving upwardly on the inn, nniili is n spiral spring encircling the bin ii and extcnilmg between the plntc ii and llnnpiocr (i the nll'l ll acts as a bear in; for ihc spring. This spring ll serves as n innnpcr or cushion spring as will hcrcinnl'ter appear. l

I is a link located on the bar and having a, nuitnblo washer lhcreon, so that it will fit the convolute wings L.

of the sleeve when both the door B tit hermetically the end of "the collar G. The collar E is "formed with a spider E and central hub E in which is secured the sleeve J, which is provided with a shoulder J whereby it is supported upon. the hub E". l he sleeve J is prevented from vertical displacement by means of a collar K fastened to the sleeve by a set screw K. The sleeve J is also pro titled with a shoulder 5 above the shoulder J upon which fits the collar L, which carries The collard" L is ta cred as indicated. are arms Jpivoted in notches at the topand provided with tails Iii, which contact with the tapered collar L. The arms M are provided with threed sec-- tions M, which are designed to engage with the screw spindledi as will hereinafter appear.

Having now described the rincipal parts involved in my invention, 1 s mall briefly describe its operation. in order to start a box and dislr l are closed l open the door and. place the box or carrier within it and then shut it ai ein. linrnedi ately the door B is opened the dish: 1 drops into the position shown in dotted lines in Fig. 1, upon the clip stop H, the vacuum beremovcd, The suction now through the e produced from any suitable source of ower draws the carrier or box onward to its destination and at the same time causes the wings L attached to the collar L and forming a-fan to rotate rapidly. The convolute wings are so set that when they rotate they cause the collar L to rise practically instantaneously and thereby'cnuse the threaded sections of the ends of the'srms M to; engage with the screw spindle 3, thereby practically forming a nut, w ich will. gradually raise the spindle 3 as the arms iotete until the-dish I carried by the clip etc reaches its sent at the bottom or the colsr which, ieriod the-box or carrie'rinserted the dlior B will have reached its destinetien. In order to insert, another box the operatien is merely re eated with the same results.

twill be, of course, readily imlerstocd that the length of tube in which the box or [the tclescopicftlihe E E carrier has to travel varies, is necessary to provide means for closing the disk I in a greater or shorter length of time, so that the air will-not he shutoii altogether until the box has reached its lestinat1on; i may effect this in three ways, by lengthening the screw 3,'adjus-ting the clip ll'-, and adg'usgt It wi l he ription that instead, as he case, of allowing the letely open during the who e travel ()f tlr or. and in fact during the hole-period that the system isworking the cashier or salesman may immediately allow the/door to close and need take nomore care 'of It.., The disk I, however, is gradually and, .tl'ierefore, it

seen from this dose haabecn forinerly t door to remain bum see,

to e nicety in the manner hereinhefore del scribed. 4

It will thus be seen that the quired in my system will he on period that the box or cash carriers are traveling and not continuously throughout every lnrtnc tube of the system, which is an im- Ipower re:- ly r uring the n portant desidcrutum for the reason that the amount of power required will be reduced to a minimum.

It will also be seen in my invention that as soon as the disk I closes the suction stops, and, therefore, the collar L will dro being no longer impelled by the suction arnlconsequently the arms M will recede from their contact with the screw spindle, which will, therefore, dro. into the normal position shown. in the sewing, the'spring H. serving to receive the concussion of the drop of the bar and act as a buffer. 1- remains closed. being held, there by the suction' "within the tubular elbow and the bar if his the hole practically hermetically.

What I claim as my invention is:

1. In e pneumatic despatch tube system, the combination with e des'patch tube having a carrier entrance and a closure therefor, of a branch tube arranged to deliver air to the despatch tube to provide for the transmission of the carrier, at closure for such branch tube, a threaded rod supporting such closure and movable longitudinally of the branch tube but held from rotation relatively there- 1 to, and means in said branch tube actuated hythe ilow of air thcrcthrough to engage and move the rod to apply the closure to the branch tube.

in a pneumatic dcspatch tube system, the combination 'ith the dcspatch tube haw ingest carrier entrance and a closure therefor, of a branch tuhc extending from the dospatch tube and arranged to deliver air to the same to provide for the transmission of the carrier, a disk. designed to. close the end of the tube, a collar having a spider located at the lower end of the vertically disposed POP tion of the tube, it her passing through a cntral opening in the spider and dish, a stop on the bar, it screw spindle connected to the u e per end of the bar, a collar secured in t .e tube and irovided with a spider having-a central hu provided with an openin a sleeve secured within the o mining in theiub and rovided with a central opening through whic the screw freely extends and a tapered rotatable collar sup iorted on the sleeve and provided with convo ute wings form'ng a fan, arms pivoted on the sleeve and )rovi ed with thread sections at the upper enii and tails extending over the taper oi the collar at the lower end as and. for the purpose specified.

3. Ina device of the class described, the

()feourse, the disk seamee combination with the tubular elbow having the vertically disposed portion and the disk adaptedin its raised position to close the lower end of the vertical portion, a collar having a spider located at t 1e lower end of the vertically disposed portion, a bar )assing through a central opening in the spiuer and disk, 9, stop on the her below the disk on which said disk is adapted to rest when in inoperative position, means for gradually raising the bar and the disk when resting on the stop, and holes in the bar for adjusting the stop as and for the purpose specified.

4. In a device of the class described, the combination with the tubular elbow having the vertically disposed ortion formed telescopically, oi a diskfor c osing the lower portion and means extending throu h the disk and o erated from the interior 0 the verticelly 'spnosed portion for raising the disk as 20 and for t e purpose specified. v

EDGAR FLINT.

Witnesses:

B. Born, A. M. CRIGHTON. 

